Solvent-based nano silicon oxide concentrated pulp and preparation method thereof

A nano-silica and concentrated slurry technology, applied in the nano field, can solve the problems of large consumption of siloxane raw materials, good dispersion of concentrated slurry, complicated process, etc., and achieves low environmental pollution, storage stability, and high solid content. Effect

Active Publication Date: 2012-04-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of solvent-type nano-silica concentrated slurry and its preparation method, solve the problems such as large consumption of siloxane raw materials and complex process in the prior art, the concentrated slurry has good dispersibility, stable storage, High solid content, low viscosity

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  • Solvent-based nano silicon oxide concentrated pulp and preparation method thereof
  • Solvent-based nano silicon oxide concentrated pulp and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this example, fluorosilane (this example is heptadecafluorodecyltrimethoxysilane) modified nano-SiO 2 The specific process of the concentrated slurry is as follows:

[0030]First prepare mixed solution, its component mass ratio is fluorosilane coupling agent: water: isopropanol=1: 15: 1, mixed solution is hydrolyzed in the hydrochloric acid solution of pH=6, and hydrolysis product is fluorosilanol; Solution quality 30% nano-SiO 2 (in this embodiment, nano-SiO 2 The average particle size is 20nm), heated at 60°C for 2h under stirring conditions, dried at 40°C, and ground into fluorosilane grafted modified nano-SiO 2 powder, in which fluorosilane: nano-SiO 2 The mass ratio is 0.15:1, and the powder is fluorosilane-modified nano-SiO 2 Powder: dispersant = 1:1 Add dispersant BYK110, disperse at 1200rpm, after confirming complete dissolution, modify nano-SiO with fluorosilane according to mass ratio 2 Powder: organic solvent = 1:3 Add organic solvent (methoxypropyl a...

Embodiment 2

[0032] In this embodiment, fluorosilane (this embodiment is trifluoropropylmethyldimethoxysilane) modified nano-SiO 2 The specific process of the concentrated slurry is as follows:

[0033] First prepare mixed solution, its component mass ratio is fluorosilane coupling agent: water: isopropanol=1: 12: 1, mixed solution is hydrolyzed in the hydrochloric acid solution of pH=5, and hydrolysis product is fluorosilanol; Solution quality 15% nano-SiO 2 (in this embodiment, nano-SiO 2 The average particle size is 20nm), heated at 80°C for 1h under stirring conditions, dried at 40°C, and ground into fluorosilane graft-modified nano-SiO 2 powder, in which fluorosilane: nano-SiO 2 The mass ratio is 0.15:1, and the powder is fluorosilane-modified nano-SiO 2 Powder: dispersant = 1: 1.2 Add dispersant BYK-P104S, disperse at 900rpm, confirm complete dissolution, modify nano-SiO with fluorosilane according to mass ratio 2 Powder: organic solvent = 1: 2 Add organic solvent (propylene gly...

Embodiment 3

[0035] In this embodiment, fluorosilane (this embodiment is trifluoropropyltrimethoxysilane) modified nano-SiO 2 The specific process of the concentrated slurry is as follows:

[0036] First prepare the mixed solution, its component mass ratio is fluorosilane coupling agent: water: isopropanol=1:15:1, the mixed solution is hydrolyzed in the hydrochloric acid solution of pH=4.5, and the hydrolyzate is fluorosilanol; 20% nano-SiO by solution mass 2 (in this embodiment, nano-SiO 2 The average particle size is 20nm), heated at 100°C for 0.5h under stirring conditions, dried at 30°C, and ground into fluorosilane graft-modified nano-SiO 2 powder, in which fluorosilane: nano-SiO 2 The mass ratio is 0.15:1, and the powder is fluorosilane-modified nano-SiO 2 Powder: dispersant = 1: 2 Add dispersant EFKA5065, disperse at 1500rpm, after confirming complete dissolution, modify nano-SiO with fluorosilane according to mass ratio 2 Powder: organic solvent = 1:5 Add organic solvent (n-bu...

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Abstract

The invention relates to the nanotechnology, and specifically relates to a solvent-based nano silicon oxide concentrated pulp and a preparation method thereof. The concentrated pulp comprises the following raw materials in percentage by mass: 10-30% of fluorosilane modified nano SiO2, 20-50% of dispersant and the balance of solvent. The preparation method comprises the following steps: dissolving the SiO2 in a mixed solution of fluorosilane coupling agent, water and isopropanol, then heating and stirring under subacid conditions, and drying before grinding into fluorosilane modified nano SiO2 powder; mixing the fluorosilane modified nano SiO2 powder with the dispersant according to a mass ratio of 1:(0.2-2), and then dispersing at 800-2000rpm; and after ensuring that the raw materials are completely dissolved, adding the solvent according to the fluorosilane modified nano SiO2 powder / solvent mass ratio of 1:(1.5-5), carrying out ball milling for 4-8 hours, and discharging to obtain the fluorosilane modified nano SiO2 concentrated pulp. The invention solves the problems of high raw material consumption, complicated process and the like in the prior art; and the concentrated pulp has good dispersibility, high storage stability, high solid content and low viscosity, thereby being applicable to multiple fields such as paint, ink, ceramic, rubber, adhesive and the like.

Description

technical field [0001] The invention relates to nanotechnology, in particular to a solvent-type nano silicon dioxide concentrated slurry and a preparation method thereof. Background technique [0002] Nano-silica is an important ultra-fine material, which has high hardness, thermal stability, and high specific surface area. It has many characteristics that conventional materials do not have in many fields, so it is widely used in various fields. Mainly used in: (1) In the field of coatings, the special optical properties of nano-silica are used to improve the performance of coatings against UV aging and heat aging, while increasing the heat insulation of coatings, and the three-dimensional properties of nano-silica can also be used. The space network structure improves the corrosion resistance and hardness of the coating; (2) In the field of adhesives and sealants, adding nano-silica to the sealant can quickly form a network structure, inhibit the flow of colloids, and accel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/12
Inventor 史洪微刘福春韩恩厚张善志于涛武琳琳
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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